Fact Sheet - BASF Serifel - Strawberries - 230607

Serifel® Biological Fungicide in Strawberries

Breaking the Mould with Biological Botrytis Control

Serifel offers strawberry growers the opportunity to diversify their protectant botrytis spray programs through the season and simplify harvest – especially when repeat picking causes short harvest intervals. As a biological fungicide, Serifel has no withholding period or maximum residue limit. Compared to other biological fungicides, Serifel results in less visible spray deposits left on the finished produce.

• Better overall control of botrytis from an integrated spray program
• Improved resistance management with lower use of chemical fungicides
• Lower quantity of residues at harvest
• Low levels of spray desposition
• Fewer MRLs to manage at harvest
• Low Restricted Re-Entry Interval for frequently harvested crops

Crop Strawberries

Application method Ground spray only

Disease controlled Grey mould/botrytis

Withholding period None

[Image: A strawberry plant with a ripe strawberry. Below, a comparison image shows a strawberry treated with "Biological competitor 3.5 kg/ha" (showing visible residue) next to a strawberry treated with "Serifel 0.5 kg/ha" (showing no visible residue).]

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Serifel® Biological Fungicide

How and When to Apply Serifel

Rates 500 g/ha

Method Mix and apply Serifel in a sufficient volume of water to ensure uniform dispersion in the spray tank and thorough coverage of foliage and fruit.

Timing Apply Serifel preventatively, prior to an infection period and the development of disease. Continue applications at 3–14 day intervals as required, when conditions favour botrytis infection and development. Use Serifel to manage low botrytis pressure conditions. Monitor disease levels and apply conventional chemistry during periods of high disease pressure. Serifel is particularly useful over harvest because it has no withholding period or MRL.

[Diagram: Suggested use pattern in strawberries showing BBCH stages from 10-19 to 91-97. Conventional chemistry is used early, with Serifel applications interspersed during fruit development and harvest.]

Resistance management Serifel itself should not be applied more than 10 times in the same year to help preserve its effectiveness. However, its key advantage for resistance management is that it can be used to reduce overall conventional fungicide use and relieve pressure on products that may most in danger of reduced efficacy.

Serifel can be used regularly in low disease conditions. Prior to periods of significant rainfall and anticipated high disease conditions, the use of conventional chemistry in rotation with Serifel is recommended.

[Chart: Botrytis control. A bar chart showing % of berries infected over 5 time points (7 DAT1 to 7 DAT5). The legend includes: Untreated control – water only; fenhexamid/iprodione/fenhexamid/cyprodinil + fludioxonil/fenhexamid; Serifel 500 g/ha x5; Serifel/iprodione/Serifel/cyprodinil + fludioxonil/Serifel. Eurofins Agrisearch Bundaberg Queensland 2013, 608 L/ha water volume.]

This trial showed the benefit of integrating Serifel with conventional products in the program. Both the first and third Serifel applications produced superior control to the standard product rotation up to those points.

For more information on Serifel, visit or contact your local BASF representative on

ALWAYS READ AND FOLLOW LABEL DIRECTIONS BEFORE USING ANY PRODUCT IN THIS FACT SHEET. This fact sheet is intended as general advice. Disclaimer: The information submitted in this publication is based on current BASF knowledge and experience. In view of the many factors that may affect its application, this data does not relieve the user from carrying out their own tests. The data does not imply assurance of certain properties or of suitability for a specific purpose. It is the responsibility of the user to ensure that any proprietary rights and existing laws and legislation are observed.

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